[Bug-apl] Quad-EA

[David B. Lamkins]

When called with a defined function (not a lambda), ⎕EA returns an incorrect 
result.

NOTE: The same issue affects ⎕EB and ⎕EC.

      ]boxing 8
      ∇z←foo
[1] z←1
[2] ∇
      foo
┌─┐
│1│
└─┘
      '0' ⎕ea 'foo'
┌→──────────┐
│1 ┌→──┐ ┌─┐│
│  │0 0│ │1││
│  └───┘ └─┘│
└∊──────────┘
      bar←{1}
      bar
┌─┐
│1│
└─┘
      '0' ⎕ea 'bar'
┌─┐
│1│
└─┘